| 叠前弹性反演在苏里格气田的应用 |
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| 引用本文： | 潘仁芳,宋鹏.叠前弹性反演在苏里格气田的应用[J].物探与化探,2010,34(2). |
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| 作者姓名： | 潘仁芳 宋鹏 |
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| 作者单位： | 1. 长江大学,地球科学学院,湖北,荆州,434023
2. 长江大学,油气资源与勘探技术教育部重点实验室,湖北,荆州,434023 |
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| 摘 要： | 苏里格气田当含气饱和度小于70%时,泊松比变化不明显,用AVO方法进行含气性检测效果不甚理想。基于Fatti近似的弹性波阻抗方法,充分利用了叠前资料进行反演,包含了丰富的岩性及流体信息,但其小角度时的算法不稳定及建立在"湿"岩石背景假设条件下的反演精度不高的缺点也很明显。改进后的Fatti近似公式算法更加稳定且建立了基于真实岩石物理参数的变量关系,提高了反演精度。应用实例表明应用从弹性阻抗反演数据体中获得的λ-μ-ρ参数进行交会,对苏里格气田低含气饱和度的气层检测效果明显,很好地反映了储层信息。
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| 关 键 词： | Fatti近似 弹性阻抗反演 λ-μ-ρ交会 泊松比 |
THE APPLICATION OF PER-STACK ELASTIC INVERSION IN SULIGE AREA |
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| PAN Ren-fang,SONG Peng.THE APPLICATION OF PER-STACK ELASTIC INVERSION IN SULIGE AREA[J].Geophysical and Geochemical Exploration,2010,34(2). |
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| Authors: | PAN Ren-fang SONG Peng |
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| Institution: | PAN Ren-fang1,SONG Peng2(1.College of Earth Science,Changjiang University,Jingzhou 434023,China,2.Key Laboratory of Oil , Gas Resources , Exploration Technology of Ministry of Education,China) |
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| Abstract: | In Sulige area,when gas saturation is lower than 70%,the change of Poisson's ratio is not obvious,and the application of AVO technique to detecting gas potential does not yield satisfactory result.The elastic impedance method based on Fatti approximation uses pre-stack data for inversion and includes abundant lithologic and fluid information.Nevertheless,its shortcomings in the aspects of the unstable solution in small angles and the low inversion precision built in wet rock background are also very obvious... |
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| Keywords: | Sulige gas-field Fatti approximation elastic impedance inversion Lambda-Mu-Rho crossplot Poisson's ratio |
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